Valve and cooling means



A. O. DADY.

vALvE AND COOLING MEANS.

APPLICATIONv FILED JAN-2.1918.

Patented Mar. 2,1920.

l////////7//////////// FI Wham MM 4UNITED sTATEs PATENT oEEroE.

ARTHUR O. DADY, OF NEW YORK, N. Y., ASSIGNORTO PFANSTIEHL COMPANY, INCORPORATED, OF NORTH CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

Application filed January 2, 1918.

To alt wlw/n. 'it may concern.'

Be it known that I, ARTHUR O. DADY, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Valves and Cooling Means, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to valves for internal combustion engines and is especially concerned with exhaust valves o'that type in which a cooling fluid is maintained in contact with the inner surfaces of the valve for cooling the same, and is particularly concerned with valves of this type in which the water used for cooling the cylinder of the internal combustion engine is also employed for cooling the exhaust valve.

One object of the invention is to provide simple and effective means for establishing communication between the valve and the Water jacket whereby the heating of the water in the exhaust valve produces a cir culation therethrough.

A further object is to provide a valve of this character with a balance piston whereby the force required to actuate thevalve is lessened and wherein the balancing piston ai'ords means for assisting in radiating the heat from the valve.

Further objects will appear as the description of this invention progresses, reference being had to the accompanying drawings in which,

Figure 1 is a vertical longitudinal section through a portion of an internal combustion engine cylinder equipped with my improved valve and cooling means; and

Fig. 2 is a View similar to Fig. 1, but showing aqnodied form of my improved valve, the valve being provided with a balancing piston for the purpose described.

Similar characters of reference refer to similar parts throughout the several views.

Referring to the drawing the reference character 1 indicates the cylinder wall of an internal combustion engine having the bore 2 and the exhaust chamber 3 communicating therewith. The cylinder is provided with a water jacket 4. The exhaust port 5 which communicates with the exhaust chamber 3 is provided with a valve seat 6 with which Speccation of Letters Patent.

Patented Mar. 2, 1920.

Serial No. 209,895.

the hollow exhaust valvehead 7 co-acts. The valve head 7 is provided with oppositely extending tubular extensions 8 and 9, the last named extension being closed at its` lower end and serving as a valve stem. T hc extension 9 slides ina bearingv sleeve 10 which is supported in a suitable bore in the water jacket. The stem 9 is provided with a plurality of ports 11 which register with ports 12 and 13 in the sleeve 10 and the water jacket respectively. The lower end o'r' the valve stem 9 is provided with an annular groove 14 for receiving the valve actuating mechanism, which may be of any desired construction. The upper tubular extension 8 is slidably received in a bearing sleeve 15 which has screwthreaded engagement with the lower wall of the hollow plug 15. The plug 15 is provided withscrewthreads which engage complementary screwthreads in the water jacket whereby the plug 15 can be removed for the insertion or removal of the valve. The plug 15 is provided with a peripheral groove 17, and ports 18 which establish communication between the interior of the plug and the groove 17. W'hen the plug is inserted, as shown, the groove 17 registers with ports 19 in the water jacket whereby the plug, in effect, becomes a portion of the water jacket.

It is believed that the operation of my improved valve will'be apparent from the above description. The water Jfrom the water jacket flows into the valve, completely filling the same. When the engine is in operation the water in the valve head becomes highly heated and flows upwardly, thereby allowing cold water to enter the valves through the ports 11, 12, and 13 and in this manner a continual circulation of water through the valve is maintained.

The structure disclosed in Fig. 2 is similar to that shown in Fig. 1 with the exception lthat the upper tubular extension 8 is provided with a balance piston 20 which reciprocates in a cylinder 21 formed in the lower side of the plug 15. The upper end of this cylinder is vented to the atmosphere through the passage 22. This construction provides means for balancing the exhaust Valve against the pressure in the e-xhaust chamber 3 and at the same time the balance pistonprovides means for radiating a por-- tion of the heat from the valve head to the adjacent portions of the water jacket.

IVhile I have described the preferred vembodiments of my invention in detail it is to be understood that my invention is capable of other adaptations or modifications and is not to be limited except by the scope of the followinor claims.

Having -thus described my invention what I cla-im as new and desire to secure `by Letters Patent of the United States is:

1. Inl an internal combustion engine the combination with a cylinder having a. water jacket, and an exhaust port provided with a valve seat, of a hollow reciprocating valve co-acting with said valve seat and provided with upper `and lower tubular extensions, the lower tubular extension being closed at its lower end, a bearing formed in .the wall of said water jacket for receiving the lower tubular extension, the said lower extension and bearing being provided with registering openings to establish communication between said extension and said water jacket, and the upper tubular extension communicatiilig with said water jacket at a higher leve 2. An -internal combustion engine, comprising a cylinder having a water jacket and 'an exhaust passage provided on one side with an exhaust port, and on the opposite side with a screw threaded opening registering with said exhaust port, a valve co-acting with said ,exhaust port, the said valve comprising a hollow head having oppositely extending tubular projections, andl a'hollow screw threaded cap co-acting with Asaidscrew threaded opening to close said exlhaust passage, the said cap being provided with a bearing for receiving one of said tubular projections,`and for establishing communication between said hollow head and said cap, the said cap and the water jacket being provided with register-- ing openings for providing communication between said cap and water jacket.

In witness whereof, I hereunto subscribe nyznalne this 21st day of December, A. D. 1 1

ARTHUR o. DADY.

Witnesses:

J. E. LOWE, V. A. DADY. 

